Method and apparatus for manufacturing brushes



Dec-31,1929. A.v.HART ET AL 1,741,700

METHOD AND APPARATUS FOR MANUFACTURING BRUSHES Filed March 23, 1927 11W- fg@- 'f 19 M@ Ww Patented Dec. 31, 1929 PA-.Tram er1-frcs smsen v. liasses, aan :esem T. HART; @E Reck-vins CENTER, NEV YORK Annesso medinar'cn es, 1921. sriaii No; 177,496.

This inventien relates tothe manufacture offbrushes and particular'objects of the invention are to facilitate the' assembly of the bristles into bundles' andthe securing of a; thesebu'nuleszn permanent brush form.

@ther important objects of the invention are to secure the bristles more firmly than has been possible heretofo'r'e7 to enable this speialseouiing' bei-iig readily performed and wfto provide a specially etfectiv'e fastening means for securing` the bristles in the back or body of the brush.

Gt-lief ob'ots andy aiins of the invention, more o'rV less broadft-han those stated above',

1511y together with the advantages'inherent, will be Tiri part obvious' and in part specifically ref-erred to in the 'course ofr the following description et" th elements, ombina'tions arrangements or parts, and applications of' 20! priniples constit'uting'the invention;v and the seep@ ofA protestiertcontemplated'een appear' from the claims.

In the accompanying drawing forming part of this specification the method of carry- 251'ing' out the invent-ion and the nal product are. illustrated in apractical Way, but it shouldbe understood that the same may vary in process and structure Without departure from the broad spirit and scope of the inven- 30-tiOI1.

Figures 1 to 6 are partly sectional views illustrating successive stages in the manufacture of the brush bundle, the first View showing the assembly of the bristles in the confining errule, the second illustrating the dipping of the errule ends of the bristles in a suitable binder or cement, the third shoWf ing the bristles being forced into the errule to leave an open space in the end of the ferrule, the fourth illustrating the entry of the pilot point and conical Wedge While the bristles are held in a clamp, the fifth showing the pilot and cone fully entered and the sixth illustrating the securing of the bristle body in the brush head bythe passage of a pin through holes in the open end portion of the terrule.

ln the present disclosure the group or bun- 50" die of bristles are shown as held in a band or terrule 72 which ferrule is used throughout thel assemblingy operation.

Thusas 'shown in Figurelinthe irststage theferrule is slipped over the mout-h of an assembling.- tunnel 8 so-as to act as a guide or continuation of the mouth of thev funnel: While the. bristles- 9'- are being pushed out. through'the` funnel into position` in the' ferL rule. In'thisirst" step the butt' ends of the' bristles are lett protruding from the end of the ferrule s that' when the ferrule is disl connectedfrom the funnel?` therel Will be a' considerable portion 9fL of the bristlesex# posed', :ready for dipping in the cement' or binding mater'ial'indicatedf at' 10 in Figure 2;

After application'o'fe thecement', the endsr off'the'bris't-'lesfare pushed intdthe terrule;v for instance, by slipping the.: terrule down over the-bristlesanditheir centering the fer.-y

rule over a jig' having a plug llrot a. size to fit? inl the end of the ferrule as'in Fivure 3. rlhis jigih'as a stop. shoulder 12-for the end' of theferrule adapted to limitv the-'extent to which Lthe bristles will be pushed into the ferrlule'.

It: will be noted in Figure Sithatthe lengtl'i of this plug portion is lesstha'n the dista-nce fromr the end othe ferrule inward: tov the internal annular. shoulder affordedzb'y the alle` nular-gi'oove 13 formed in therperiphery of the ferrule so as'- to leave portions of thel bristlesfat both-sides otsaidannular shoulder.

The. next step involves-theloeking ofthe' bristles in the errule' andv the iii-st' portion' of thisopera-tion involves the engagement ofi a clamp about the bristles to hold them comL pactly grouped and to take the' thrust resulting from the driving of a securing Wedge into the be dy ofl the bristles.

Thefcl'am-p is shown in Figures 4 and 5 as made up offtwosemi-cylindrical members 14 connected together by ahinge joint 15 andv secured'in closed 'relation' by spring clasps 16 on: one` part of the Clamp' having ai snappingl interlocking engagement with lugs or catches 17.' on the other part of the Vclamp'. This` clamp is indicated. as having an internal shoulder' 18 adapted to'engage the lower end of the ferrule' so'- as to support thesame a" distance above the table 19,1 Figure 5'; equal# to the length of the bristles; in other words, so that the bristles may touch the table while the ferrule is positively supported by the clamp. In this relation and while the ferrule is thus positively supported independently oi the bristles, a tapered pin or pilot 20 is entered in the center of the body of bristles, as in Figure 4E, and drive-n down ahead of the locking wedge 2l which is shown as constructed in frusto-conical form as a continuation of the pilot pin. This wedge is shown as centered and temporarily held in centered position on the end of the pilot by a Center pin 22 which, in the case of a wooden wedge, will enter the end of the wedge block as the same is forced down onto the pilot.

In the final position indicated in Figure 5, the wedge has been laid by the pilot down into the ferrule with its lower end substantially in line with the lower end of the ferrule and its upper or larger' end substantially in line with the cemented ends of the bristles, where it holds the bristles firmly wedged over the top of the internal locking shoulder.

The pilot pin is shown as slightly longer than the length of the bristles from the end of the ferrule and as sharply pointed so that it may enter the material of the table, which usually will be of wood and remain temporarily attached to the table when the ferrule wish the anchored bristles are lifted oif the ta le. leased and taken away from the bristles so that the bristles will release their hold on the pilot pin. Y

The upper open end of the ferrule which is clear of the bristles is pierced in its opposite sides as indicated at 23 to receive a fastening wire or pin 24, Figure 6, which is driven in through properly placed openings 25 in the brush block or back 26. This block is shown as having a socket or sockets 27 to receive the bristle bundles and as having an annular groove 28 at the back of each socket to take the protruding end portion of the ferrule. In this relation they ends of the bristles and the end of the wedge are backed up by that portion 29 of the block within the annular groove so that the bristles and wedge are positively held at the back against displacement.

What is claimed is:

l. The process of manufacturing brushes which comprises assembling the brush bristles in a ferrule with the base ends of the bristles projecting from the ferrule, applying a cementing medium to the projecting ends of the bristles, forcing the cemented ends of the bristles into the ferrule far enough to leave the end of the ferrule open and clear of bristles, enclosing the protruding brush portion of the bristles and supporting the ferrule independently of the bristles, driving a wedge member and a preceding piloting member in through the open' end of the fer- Usually, the clamp will first be rerule while so supported, far enough to leave the wedge member in the ferrule and the piloting member in the protruding portion of the bristles and then removing the piloting member from the bristles.

2. The process of manufacturing brushes which comprises assembling thebrush bristles in a ferrule with the base ends of the bristles projecting from the ferrule, applying a cementing medium to the projecting yends of the bristles, forcing the cemented ends of the bristles into the ferrule far enough to leave the end of the ferrule open and clear of bristies, enclosing the protruding brush portion of the bristles and supporting the ferrule independently of the bristles, driving a wedge member and a preceding piloting member in through the open end of the ferrule while tles in a ferrule and then driving a wedge member in the ferrule and the piloting member in the protruding portion of the bristles and then removing the piloting member from the bristles, seating the back end of the bristles and wedge member against a support and passing a fastening pin through said support and the sides of the open end portion of the ferrule.

3. ln the manufacture of brushes, the process which comprises assembling brushbristles in a ferrule and then driving a wedge block preceded by a penetrating pilot in through the back end of the ferrule far enough to. leave the wedge block embedded in that part of the bristles within the ferrule and the pilot in the protruding port-ion of the bristles where it-may be readily separated therefrom. j

In testimony whereof we aii'iX our signatures.

ALFRED V. HART. JOSEPH T. HART. 

